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arXiv 2101.01650math.GTmath.AGmath.NT
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关于$k$ -微分层连通分量的分类

Towards a classification of connected components of the strata of $k$-differentials

Dawei Chen, Quentin Gendron

摘要:

黎曼曲面上的$k$ -微分是典范丛的$k$ -次幂的一个截面。$k$ -微分的具有指定数目和零点和极点重数的轨迹形成$k$ -微分的模空间的自然分层。$k$ -微分层的连通分支的分类是已知的全纯微分,亚纯微分和二次微分与最坏的单极点的Kontsevich-Zorich,Boissy和Lanneau,分别。建立在他们的工作,我们开发新的技术来研究连接组件的地层$k$ -一般$k$的差异。作为应用,我们给出了具有任意极点的二次微分层的连通分支的完全分类。此外,我们区分某些组件的地层的$k$ -微分通过推广超椭圆结构和自旋宇称更高的$k$。我们还描述了一种方法来确定明确的奇偶性的$k$ -微分亏格0和1,这启发了一个有趣的猜想在数论。我们使用的一个关键观点是多尺度$k$ -差分的概念,由Bainbridge-Chen-Gendron-Grushevsky-Möller为$k = 1$引入,并由Costantini-Möller-Zachhuber为所有$k$扩展。

英文摘要:

A $k$-differential on a Riemann surface is a section of the $k$-th power of the canonical bundle. Loci of $k$-differentials with prescribed number and multiplicities of zeros and poles form a natural stratification for the moduli space of $k$-differentials. The classification of connected components of the strata of $k$-differentials was known for holomorphic differentials, meromorphic differentials and quadratic differentials with at worst simple poles by Kontsevich--Zorich, Boissy and Lanneau, respectively. Built on their work we develop new techniques to study connected components of the strata of $k$-differentials for general $k$. As an application, we give a complete classification of connected components of the strata of quadratic differentials with arbitrary poles. Moreover, we distinguish certain components of the strata of $k$-differentials by generalizing the hyperelliptic structure and spin parity for higher $k$. We also describe an approach to determine explicitly parities of $k$-differentials in genus zero and one, which inspires an amusing conjecture in number theory. A key viewpoint we use is the notion of multi-scale $k$-differentials introduced by Bainbridge--Chen--Gendron--Grushevsky--Möller for $k = 1$ and extended by Costantini--Möller--Zachhuber for all $k$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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